AMD Radeon RX 6600 XT “Navi 23” Specs Surface: Coming in April

With the launch of the Radeon RX 6700 XT today, rumors have started floating up regarding the next Navi 2x GPU in the pipeline. The specifications of the Navi 23 based RX 6600 XT were posted by Yuko Yoshida earlier today. These are the first details of the GPU codenamed Dimgray Cavefish we’re seeing, and as such take them with a grain of salt:

The Radeon RX 6600 XT will reportedly pack 32 Computer Units, down from 36 on the RX 5600 XT and a cut down 128-bit bus paired with 8GB of GDDR6 memory running at 16Gbps. That’s quite the drop from the 192-bit interface that fed the RX 5600 XT and may cause bottlenecks in certain situations. Luckily for AMD, this GPU is geared towards “premium 1080p gaming” and as such, the load on the memory subsystem will be fairly moderate.

RX 5600 XTRX 6600 XTRX 6700 XT
ArchNavi Navi 2XNavi 2X
DieNavi 10Navi 23Navi 22
Shader/CU Count2,304/362,048/322,560/40
Memory Bus192-bit128-bit192-bit
Infinity Cache N/A64MB96MB

To make up for the cut-down bus, the budget RDNA 2 GPU is getting 64MB of L3 “Infinity Cache”, with a targeted performance roughly on par with the GeForce RTX 3060. It’s interesting to note that the latter comes with a 192-bit bus and an overall external memory bandwidth of 360GB/s. The Radeon RX 6600 XT, on the other hand, will likely be limited to under 200GB/s, and be a smidge slower.

The source believes that the RX 6600 XT will be launched next month, with the Cezanne desktop APUs (Ryzen 5000G or Ryzen Pro 5000G) slated for a June launch. This would make sense as we’ve started a lot of engineering and qualification samples on Chinese blogs lately.



Computer hardware enthusiast, PC gamer, and almost an engineer. Former co-founder of Techquila (2017-2019), a fairly successful tech outlet. Been working on Hardware Times since 2019, an outlet dedicated to computer hardware and its applications.

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